Yes, zero dean, you are right. Tiki coders are attempting to fix those problems for new admins for the next release 1.9.8...
That's the common place to ask this kind of questions, or at any other more specific forum, but here is ok.
It looks like you have a problem of too low memory_limit in your server. Check this FAQ and ask your server admin, if needed.
Cheers, and welcome to Tikiwiki Community!
Beyond those small initial difficulties you had in your case, there might be much more (and better) in Tikiwiki for your website needs...
Remember to check the Documentation, if needed: