iTunes to iPad, iPad puts songs in a different order

A common cause of tracks within an album being in a different order on a device is an inconsistent use of Disc X of Y values. 1 of 1 and <Blank> of <Blank> may variously come first or last in the two contexts. A playlist, sorted by ascending play order, should give the same order in both cases.

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That old thing of 1, 10, 11 suggests an alphabetic sort on character values rather than a numeric sort. That's why track numbers in file names usually have leading zeros so that the alphabetic sort gives the same order that a numeric sort would. See https://samsoft.org.uk/itunes/grouping.asp for some more background on organizing content with iTunes. In general every track should have a unique track number, and if there are disc numbers (for a multi-disc album) they should be used consistently. If it is a single disc album then the disc numbers should either be set to Disc 1 of 1 for all tracks, or Disc <Blank> of <Blank>. For multi-disc albums no two tracks should have matching disc and track numbers.

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