r.tile incorrect overlapping

[aardgoose]

r.tile using an overlap of 1 overlaps adjacent tiles by 2 columns, illustrated by the r.info extract below. Resolution is 32m and overlap S -N of is 64m.

+----------------------------------------------------------------------------+ | Map: TEXTZ-000-000@SK Date: Tue Apr 26 11:52:03 2016 | | Title: Tile 0,0 of SK32M ( TEXTZ-000-000 ) | | Timestamp: none |

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| | | Type of Map: raster Number of Categories: 0 | | Data Type: DCELL | | Rows: 100 | | Columns: 100 | | Total Cells: 10000 | | Projection: Transverse Mercator | | N: 390031.98976328 S: 386833.0134357 Res: 31.98976328 | | E: 403166.31130064 W: 399968.01705757 Res: 31.98294243 | | Range of data: min = 149.215669047674 max = 373.009547999747 | | | | Data Source: | | SK32M | | | | | | Data Description: | | generated by r.tile | | | | Comments: | | r.tile --verbose input="SK32M" output="TEXTZ" width=98 height=98 ove\ | | rlap=1 | | | +----------------------------------------------------------------------------+

+----------------------------------------------------------------------------+ | Map: TEXTZ-001-000@SK Date: Tue Apr 26 11:52:03 2016 | | Title: Tile 0,1 of SK32M ( TEXTZ-001-000 ) | | Timestamp: none |

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| | | Type of Map: raster Number of Categories: 0 | | Data Type: DCELL | | Rows: 100 | | Columns: 100 | | Total Cells: 10000 | | Projection: Transverse Mercator | | N: 386896.99296225 S: 383698.01663468 Res: 31.98976328 | | E: 403166.31130064 W: 399968.01705757 Res: 31.98294243 | | Range of data: min = 127.552440611917 max = 409.305838621671 | | | | Data Source: | | SK32M | | | | | | Data Description: | | generated by r.tile | | | | Comments: | | r.tile --verbose input="SK32M" output="TEXTZ" width=98 height=98 ove\ | | rlap=1 |