Welcome to the Q&A Forum

Your good.
Moz is simply letting you know where they are.

Remember that a lot of links you had are now no longer, removed or disavowed you cant expect to rank the same.
Also how long has it been since you had penalty lifted. It may take a while for all things to equal up again.

I think if you read, they are notices, not errors.

Having a canonical tag in your page that is incorrect and not knowing it exists, can be a big problem, so moz notifies you that they exist, that's all.

All redirects lose link juice, Gregory is correct in what he says, but you would lose a bit of link juice in the redirect, better to use the anchor, it is ignored

ajax is great for loading content on demand without reloading the page, but for content you want to rank I would not be using it.
For dynamic content you want to rank you should load on initial request to server.

Using solutions like you are just get very messy, and are more work then doing as I suggest

I would find any pages that's have external links, and only 301 them, as there is no use 301'ing pages that have no external links, you can 301 any url you want, the language is not relevant.

What server are you on IIS(Microsoft) or Apache? For Apache then use .htaccess for iis use web.config

Me myself I would not be moving to WordPress, you will end up with many more crawling problems

Best idea is to fix the links so that they point to the correct url, then 301 the unwanted url to the good url.

If you simply use a 301 or a canonical you will be losing link juice on the redirect

How many links do you have, Bing may ignore your page if you have more than 250

having a canonical tag say domain.com/mypage for the url domain.com/mypage does nothing as far as search engines are concerned.

If the content is reachable by another url lets say domain.com/mypage2 then having the canonical tag domain.com/mypage will tell the search engine that domain.com/mypage is the canonical page.

Can you explain what you are trying to do and your problem a bit clearer

thanks

If the links are good ones, 301 redirect to a good page, you don't have to have a blank page at that url.

if they are bad links just leave them. if that are 404'ing then they can do you no harm.

The only 404's that can do you harm are ones from your own internal links, because it means you have link juice leaks. fix any if you have them

any links you can get daily, Are probably not worth anything, if you can just get a link on demand then why would google value it?

This would only work if the old site is still live, you need to place the canonical tag in the old page pointing to the new page to transfere link juice.

You can only transfer link juice thought a request (eg: a link)if no links point to old pages, there is no need for the link juice

Having a canonical link pointing to that same url as in the address bar has no affect as far as search engines are concern, the reason moz.com gives for doing this is that if some one scrapes your site, the canonical will point back to the original.

The whole idea of canonical tags and 301's is to do with requests, you want the all requests showing the same content to appear the same page to the search engine.

With normal pages a slash means a different request that without, and to fix it you need to create a 301 that requests again to the correct url. in the process you have lost a bit of link juice.

but when requesting the home page with or without the "/", the request is the same. there is no need to fix it.

press F12 in your browser and test it yourself using the network tab, you can see that entering the url with or without the "/" on the homepage results in the same request.

301's do take resources, but very little, but there has to be a limit, 1000 is a lot.

why do you need so many?

With your old site see what pages had external links, and 301 them, there is no reason to 301 those that do not.

Philip gives good advise, I would add, that if there is no manual penalty, then the algorithm will be dismissing links at best, it would not be penalizing you for them. not for links anyhow

but as Philip said, the domain seems to be parked

If you have a trailing slash, on a url like domain.com/mypage/ then that is a different url to domain.com/mypage

If you fix this with a 301 you lose a bit of link juice in the redirect.

but if you are talking about a homepage url such as domain.com and domain.com/ these are not treated as different urls, there is no redirect between them. there is no problem here, don't worry about it

Matt Cutts recently said that Guest posting is dead. I don't have the link but I am sure  you will find story if you look

Bing says 150,

http://thatsit.com.au/seo/reports/violation/the-description-is-too-long

You will be ok, sites in different tld's are not treated as duplicate content.

Matt cuts https://www.youtube.com/watch?v=Ets7nHOV1Yo

does the root domain link to the subdomain?

if so then noindex,follow the pages in the subdomain, this will allow link juice to flow back out of the subdomain.
any links pointing to a  nofollow page will waste their link juice