Aligning templates and changing products

[MPFG-sos]

So I am new to Zazzle and in the last 7 weeks i have created  100 products ...mostly christmas cards, wrapping paper, tissue paper, stickers , name tags and gift bags

I know I am too late for the Christmas market but this has been a steep learning curve and I look to build a store and re-edit for next Christmas 

My designs are fine but where my products may have fallen down is in 2 areas but I have 3 questions if I may

1. I found the zazzle editor painful, slow and almost impossible to get correct if aligning repeat text and repeat photo templates . I did upload images as overlays and even used gold cirlces to put photos in for repeatives design wrapping paper . But the zazzle tools realigns my uploaded backgrounds even when i use the 'suggested sizes'  and the lines it gives as guides do not always work correctly . I for instnace created  gold cirlces to place photos in but when I would come out of the editor even after usign the lines the photos were never completely lined up correctly in the gold circle and if i zoomed in on the editor it was hard to judged as i pulled photos to their location.  ...This has caused me such stress and a lack of confidence on the quality I my wrapping paper ...How do other do this or maybe they dont ? Why are therre no size or position points on the editing board and why does the alignment feature work so poorly. I had also same  problem when trying to align ribbon motifs on the zazzle board. I am talking about realigning templates here both text and photos in the one design. My desings I create  in a external editor.

The editor is one of the reasosn to make me want to not continue with Zazzle. I am currently assessing my options

2. I was unaware of the issue of what looks good on my desk top does not necessarily look good on pintrest on someone's phone. I have alot of woodland designs but the greesn have totally washed out my designs on the phone. How do you desing for colour to cover both bases ? Its a pity as some of my designs are nice on my laptop but dreadful on my phone 

3. Finally what to do about error or issues with published work. Should one delete a product after it has been published and begin again or hide it or what ? There are some of my producst I could improve for next Christmas but what si the best approach ? If I  want to have a better store next christmas and in my hurry this year I may have had some minor mistakes or chosen poor fonts or colour backgrounds, etc ...what is the best appraoch so by next year my strore is professional looking and I havent wasted my time with my current work

Any pointers would be gratefully received