Title center in grid title mosaic & photo mosaic

hello I have two problems concerning my blog

1 – my articles are in the home page in grid but the is not center. I have change the CSS and now is texte-align: center; but the title is always to the left.

2 – I have a page Whislist and I would like put several images (not a copy the images include in the posts) but I don’t understand which plugin for this.

All my apologize for my english

Thanks in advance

Best regards

see my blog http://www.modeandmood.com