Tables/wiki markup pasted in bevior

Hello. We are using Confluence 5.9.10. We have an example page that is built of sections, screenshot of this page is attached. You cannot copy and paste tables from section to section. Multi-line tables pasted in from wiki markup do not convert properly (middle section). You cannot join split tables (right section). These were not problems when we could edit wiki markup. We'd simply go into the markup, edit it, fix what was formatted incorrectly, done. I would appreciate if you tried duplicating what we're trying to do and either make a feature request to allow more versatility, or suggest work arounds if any. Thanks.