The first one is a link that goes to the community from your current instance, which is handy. E.g. when I click it, I'll go to https://discuss.online/c/[email protected]. If someone on lemmy.world clicks it, they'll go to https://lemmy.world/c/[email protected]. This format is specific to Lemmy, but is similar to reddit's /r/flask syntax.
The second link is a regular markdown link, and has the general format of [regular text](some url). This will always go straight to the URL, and won't have the above behavior. Generally for linking stuff like this, the first option is preferred.
All that said, to answer your question, I think you just typo'ed the URL. You typed lemm.me (extra m) instead of lemm.ee
woops. there's no delete confirmation, and im writing my thankyou message for the third time
thanks a lot!!!
on a side note, i hate your pfp. lol it took me a while to figure out whats wrong.
oh wow, there's no delete confirmation, that sucks. i misclicked my entire thankyou comment,
once again, thanks a lot!
and i hate your pfp >:( it makes me feel that lemme is slow lol it took me some time to figure out