Hi Richard,
Thank you for your update.
We were able to reproduce the reported issues "Textsize and Dropdowntextsize vary in different device","Cannot remove the text of predefined Watermark property","Clearing selection text dosen't clear previous selected index and value" and "When selected text from suggestionlist is edited,entry doesn't match to the list entries after leaving control". We have logged bug report for all internally.
The fix for the reported issues will be available on 2017 Volume 1 SP2 release which is expected to be rolled out by the end of March 2017.
Query 1: Incorrect selected items from the suggestion list since the entry is not corrrect.
We were unable to reproduce the reported issue "Incorrect selected items from the suggestion list since the entry is not corrrect". We have attached you the output screenshot and please download the same from below link.
Link:
http://www.syncfusion.com/downloads/support/forum/129196/ze/autocomplete_screenshot-2053457594
Query 2: preselect a existing item in list and cannot set a value to selectedvalue.
We have considered the reported behavior "preselect a existing item in list and cannot set a value to selectedvalue" as feature request. The feature will be available in any of our upcoming release. Please check our updates periodically.
Regards,
Vanaja R.A.